package com.bitejiuyeke.services.impl;

import com.bitejiuyeke.common.AppResult;
import com.bitejiuyeke.common.ResultCode;
import com.bitejiuyeke.dao.BoardMapper;
import com.bitejiuyeke.exception.ApplicationException;
import com.bitejiuyeke.model.Board;
import com.bitejiuyeke.services.IBoardService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.Date;
import java.util.List;

/**
 * @Author 比特就业课
 */
@Slf4j // 日志
@Service // 加入到Spring
public class BoardServiceImpl implements IBoardService {

    @Resource
    private BoardMapper boardMapper;

    @Override
    public List<Board> selectByNum(Integer num) {
        // 非空校验
        if (num == null || num <= 0) {
            // 打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        // 调用DAO
        List<Board> boards = boardMapper.selectByNum(num);
        // 返回结果
        return boards;
    }

    @Override
    public Board selectById(Long id) {
        // 非空校验
        if (id == null || id <= 0) {
            // 打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        // 调用DAO
        Board board = boardMapper.selectByPrimaryKey(id);
        // 返回结果
        return board;
    }

    @Override
    public void addOneArticleCountById(Long id) {
        // 非空校验
        if (id == null || id <= 0) {
            // 打印日志
            log.warn(ResultCode.FAILED_PARAMS_VALIDATE.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_PARAMS_VALIDATE));
        }
        // 获取用户信息
        Board board = selectById(id);
        if (board == null || board.getDeleteState() == 1) {
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.FAILED_BOARD_NOT_EXISTS));
        }
        // 构造更新对象
        Board updateBoard = new Board();
        // 用户Id
        updateBoard.setId(board.getId());
        // 发帖数在原来的基础上加1
        updateBoard.setArticleCount(board.getArticleCount() + 1);
        // 更新时间
        updateBoard.setUpdateTime(new Date());

        // 调用DAO
        int row = boardMapper.updateByPrimaryKeySelective(updateBoard);
        if (row != 1) {
            // 打印日志
            log.warn(ResultCode.ERROR_SERVICES.toString());
            // 抛出异常
            throw new ApplicationException(AppResult.failed(ResultCode.ERROR_SERVICES));
        }
    }
}
